Class cast exception on inlined varargs

[nicolasstucki]

Minimized code

object Test extends App {
  inline def foo(ys: Int*): Unit = Array(ys: _*)
  val xs = new Array[Int](3)
  foo(xs: _*)
}

fails with

Caused by: java.lang.ClassCastException: [I cannot be cast to scala.collection.Seq
	at Test$.<init>(foo.scala:5)
	at Test$.<clinit>(foo.scala)
	... 7 more

but adding an explicit type to xs makes it work

val xs: scala.collection.Seq[Int] = new Array[Int](3)

Expectation

The code should work

[nicolasstucki]

There is a missing wrapIntArray call around xs in the inlining of foo.

We currently get

val xs: Array[Int] = new Array[Int](3)
    {
      val ys: Int* = this.xs:Int*
      this.bar(
        {
          ys
        }:Int*
      ):Unit
    }

where we should have

val xs: Array[Int] = new Array[Int](3)
    {
      val ys: Seq[Int] = wrapIntArray(this.xs)
      this.bar(
        {
          ys
        }:Int*
      ):Unit
    }